Apparatus for forming hollow glass articles



Aug. 13, 1935.; I VXG.E.'ROWEV 2,011,187"

' APPARATUS FOR FORMING HOLLOW GLASS ARTICLES Filed May 18, 1933 6 Sheets-Sheet l r In v en for: v I .360Zfl6 caRizvwe Wz'zn ess: I I 5 31M YM- fi. .41701 12 ys.

G. E. ROWE 2,011,187

APPARATUS FOR FORMING HOLLOW GLASS ARTICLES S Sheets-Sheet 2 l\ N 51 E Aug. 13, 1935.

Filed May 18, 1933 lnven tor.- 3190296 6320106.

WitneSs:

Aug. 13; 1935. G. E.ROWE

APPARATUS FOR FORMING HOLLOW GLASS ARTICLES 6 Sheets-Sheet 3 Filed May 18, 1935 VIII/Ill, Q m@ v m Ma Wh\ In ven to) #Qeogg ffiowe A fl orn gs.

Mzness a2. a. w

Aug. 13, 1935. G. E. ROWE APPARATUS FOR FORMING HOLLOW GLASS ARTICLES.

Filed May 18, 1953 6 Sheets-Sheet, 4

In can for 666: Q. a M

tiorneus'.

Aug. 13, 1935. ca. E. ROWE APPARATUS FOR FORMING HOLLOW GLASS ARTICLES Filed May 18, 1933 6 Sheets-Sheet 5 in 1 211 for: $80296 (T-72301416 Wizn ess:

A ti'orn eggs.

Q Qaw GME. ROWE 2,0ll,187 APPAlATUS FOR FORMING HOLLOW GLASS ARTICLES' 6 Sfieets-Sheet 6 Filed May 18, 1953 8 7 3 8 2 5 4 2 m 2 6 3 v? 4 4 1 1. 4 M w w 0 7 gm 7 41 9 W ...h l\\\ \l \\\\\\\\r/ 1 5 g w w 4 4 6 m 6 7 m m 4 v s 4 m 5v mm M 8 m I. mf v 2 51s M 7 112 can to! A if orn e gs.

1 f I v i Wifness:

Patented Aug. 13, 1935 UNITED STATES.

APPARATUS FOR FORMING HOLLOW GLASS ARTICLES George E. Rowe, Wethersfield, Conn., assignor to Hartford-Empire Company, Hartford, Conn., a corporation of Delaware Application May 18, 1933, Serial No. 671,610

7 Claims.

This invention relates to apparatus for forming hollow glass articles and more particularly to apparatus usable for rapidly forming articles of the pressed and blown type by what is now known as an overlapping cycle.

A machine for forming glass articles by an overlapping cycle, that is in which final blowing of one article in a final blow mold overlaps in point of time the supplying of a second charge of glass to the corresponding blank mold, is disclosed in the patent to Ingle, No. 1,843,160, granted February 2, 1932. The disclosure of that patent is of a stationary unit machine. In view of the general popularity of rotary machines, especially of the single turret ,type, the present invention includes the provision of an overlapping cycle in a single turret rotary machine, and more particularly the provision of new and. improved apparatus for carrying out the bottle forming process using this type of cycle, with the accompanying advantages of high speed of article formation in terms of articles per mold per minute and at the same time the production of high quality ware, due in some measure at least to the ability to maintain the molds at suiliciently high temperatures so that they will operate efliciently in the extraction of heat from the glass.

Among the objects of the invention is to provide in a machine of the single turret rotary type for a series of blow heads equal in number 'to that of the blow molds provided, wherein each blow head co-operates successively with two adjacent blow molds, and thus each blow mold is supplied successively during the formation of each article with blowing pressure by two adjacent blow heads, the blow heads being mounted on and rotating with the turret, so that the application of blowing pressure is not limited to periods of dwell of the turret, if such periods are provided.

A further object of the invention is to provide ing in a straight horizontal path adjacent,

to the turret and in which there is provision for causing the speed of the tongs mechanism to approximate that of the delivery c0nveyor during the placing of articles thereon, this action to take place during movement of the blow head between two molds with which it is adapted Y alternately to cooperate.

A further object of the invention is to provide in a machine of the character described a simdescription and appended claims when taken in 5 connection with the accompanying drawings, in

which:

Figure 1 is a view partly in plan and partly in horizontal section with certain structure omitted to show the cycle of the machine as well as certain of the structural features thereof;

Fig. 2 is a view chiefiyin vertical section from the outside of the machine, as seen in Fig. 1 at the left, through the center thereof and illustrating the manner of charging the molds and the mounting and construction of the blank forming means, certain of the ainpiping being illustrated diagrammatically;

Fig. 3 is a view similar to Fig. 2, but taken at a different angle of the machine to illustrate the removal of completed articles and certain of the operating mechanisms;

. Fig. 4 is a fragmentary view in vertical section on the line 4-4 of Fig. 3;

Fig. 5 is a fragmentary view in plan with parts 25 broken away and in section to illustrate certain of the construction relating to the operating means for the neck ring and the combined blow head and take-out mechanism;

Fig. 6 is a view principally in plan and partly in horizontal section showing the neck ring and certain associated operating mechanism;

Fig. '1 is a detail view principally in elevation of the structure shown in Fig. 6;

Fig. 8 is a fragmentary view in plan of the end of the arm carrying the combined blow head and take-out mechanism;

Fig. 9 is a view principally in elevation, but

g with parts broken away and in vertical section,

illustrating the structure shown in Fig. 8; Fig. 10 is a view in vertical section on the line i0lll of Fig. 9;

Fig. 11 is an end elevation of the combined blow head and take-out as seen from the left of Figs. 8 and 9; and

. 45 Figs. 12 to 18 inclusive are diagrammatic views illustrating the various steps in the process of making an article, Fig. 12 showing the supplying of a charge of glass to the blank mold; Fig. 13,

the pressing thereof to form a blank; Fig. 14, the stripping of the blank mold preparatory to the transfer; Fig. 15, the blank within the open blow mold after the transfer has been substanially completed; Fig. 16, the final blowing of the article through the neck ring; Fig. 17, the

secondary final blowing without the neck ring;

- and Fig. 18, the removal of thecompleted article and the placing of it upon the removal conveyor.

I have'chosen to illustrate as an embodiment of my invention a machine of the continuously rotating, single turret type for manufacturing articles of hollow glassware by the press and blow method, this machine embodying the several features above outlined in the several objects of the invention.

Main construction and turret rotating means The machine of the accompanying drawings is shown as mounted upon a base i, which is provided with wheels 2 so that it may be moved toward and from a desired operating position. The

' base It carries stepped therein a stationary vertical column 3 by which the rotating parts are uided and which also serves to hold certain of the fixed cams for operating various of the working instrumentalities. The base icarries secured thereto as at 4 an annular member 5 which carries the lower raceway 6 of ball bearings 1 by which the weight of the rotating parts of the turret is supported.

The main turret comprises a lower turret plate 8 which is provided with a bearing portion 9 surrounding column 3 to locate this plate against lateral movement, the plate 8 also carrying the upper raceway Illresting upon the ball bearings The turret also includes the upper turret plate ll having a bearing portion l2 surrounding a portion of the column 3, the plates 8 and ll be-.

ing secured together by a plurality of rigid ver-. tical shafts l3 suitably bolted to these two plates;

beveled pinion 2| on ahorizontallyextendingshaft The shaft 22 adapted to be driven from 22. any suitable source of-power operated in suitable synchronized time relation with the glass feeding device generally indicated at F (Fig. ,2) Means are preferably provided for throwing out the forming machine during the continuous operation of the feeder, such as a clutch (not shown), and other means are preferably provided for protecting the driving mechanism in the event that there is an overload on the machine, so as to prevent breakage of the parts, such means including a shearing pin (not shown) in suitable relation to the machine drive. These means are not illustrated in the accompanying drawings and may be assumed to be conventional.

Mold, mounting and operating means The machine as illustrated in the accompanying drawings is provided with eight forming units,

each unit including a blank mold and a blow mold and, suitable means for forming glass articles therein. Inasmuch as these units are all similar each to the others, a description of one will sufllcev The blank and blow mold of each unit are mounted upon a swing plate 23 which is arranged for limited pivotal movementwith respect to the lower turret plate 8. Each plate 23 is mounted upon a vertical axis pivot 24 which is journaled in the lower turret plate 8 and also in a bearing in a spider 25 secured to the turret plate 8 as by bolts 26.

The blank molds illustrated each comprise a pair of complementary portions or halves 21 each portion or half being suitably received in a mold holder 28, as seen in FigsIl, 2, 5, and 12 to 14; The mold holders 28 are pivoted upon a common vertical pintle 29 secured in the swing plate 23 as by the pin 30 (Fig. 2).

For opening andclosing the blank mold there is provided a substantially V-shaped yoke member 3| which is connected to the two 'mold holders 28 by short links 32. The yoke 3| is secured to the outer end of a rod or shaft 33 which is slidingly received in a bearing 34, which may be either round or square in section, and a bearing 35, which is preferably square or non-circular in section so as to prevent rotation of the rod 33 with respect to its bearings. The bearings 34 and 35 may be formed either integral or rigid with the swing plate 23, as illustrated in Fig. 2. Arranged to slide upon a non-circular portion of the rod 33 is a collar 36 carrying a cam roller 31 which is adapted to cooperate with the fixed cam 38 secured to themain colurrm 3, as by the set screw 39. The non-circular section of the rod 33 upon which the collar 36 slides serves to prevent the roller 31 rotating out of the desired position as illustrated in the drawings. A collar 46 is secured to the rod 33 and is separated from the sliding collar 36 by a compression spring 4|. At the right of the sliding collar 36, as seen in Fig. 2 of the drawings, the rod 33 is provided with a shoulder 42 against which the sliding collar 36 may abut. Thus movement of the cam roller 31 to the left, as seen in Fig. 2, will be efifective through the compression of the spring 4| and the collar 40 to cause a resilient movement of the rod 33 to the left, this resiliently closing the blank mold. Movement of the roll 31 to the right as seen in this figure will be efiective to cause the engagement of the sliding collar 36 with the shoulder 42 of the shaft 33 and this will positively move the shaft 33 inwardly of the machine to cause the positive opening of the blank mold.

While I have shown and described a blank mold formed in parts or sections, it will be understood that certain types of articles may be formed by the use of a one-piece blank mold, such construction being within the purview of my invention. In the event that this type of blank mold is used, the blank mold opening and closing means may be dispensed with and the mold merely mounted rigidly, but removably, upon the swing plate 23.

The .partible blank mold shown in the accompanying drawings and above described is provided with a suitable bottom plate 43 (Figs. 2 and 12 to 14). This bottom plate is carried on the upper end of a stud which is removably carried by an arm 44 which may be secured to the lower end of the pintle 29, or in any other manner to swing plate 23. No provision is made in the machine illustrated-for movement of the bottom plate although such provision may be employed if desired.

The blow mold ofeach unit is formed in a manner similar to the blank mold of complementary portions or halves 45 removably secured in mold holders 46, as illustrated in Figs. 3, 5 and 15 to 1'7, the mold holders beingpivoted as seen in Fig. 3, upon a pintle 41 rigidly secured in the swing plate 23 as by'a pin 48. The lower end of the pintle 41 may be used as a support for the II sponding to the shoulder 42.

arm 49 which removably carries the bottom plate 50 for the blow mold, in a manner similar to that described above for the blank mold.

Means are provided for opening and closing the halves of the blow mold in substantially the same manner and by mechanism similar to that above described for the blank mold. This means includes a substantially V-shaped yoke member connected to the two halves of the blow mold holder by short links 52 and carried by the outer end of a rod 53 mounted in bearings 54 and 55 corresponding respectively to bearings 34 and 35. The rod 53 is similarly formed with two portions non-circular in section, as above described, as

best shown in Fig. 4, which illustrates the sliding collar 56 on a square portion of the shaft 53. The collar 56 carries a cam roller 51 which cooperates with the same cam 38, as in the case of the blank mold operating cam roller 31. Thus the blank and blow molds will be operated substantially simultaneously, the blow mold being first opened or closed and the blank mold operated in the same way immediately thereafter. This will be evident from a consideration of Fig. l of the drawings wherein the arrow indicates the direction of rotation of the turret as clockwise and in each unit the blow mold leads the blank mold in the direction of rotation of the turret. The rod 53 is similarly provided with a collar 58 secured thereto and separated from the sliding collar 56 by a compression spring 59, it being understood that there is a shoulder on the rod 53 between two portions of different section correopening and closingv of the blow mold is exactly the same asthat described above for the blank mold, the moldhalves or portions being closed resiliently and positively opened by and in re sponse to the rotating movement of the turret operating through the relative movement between the cam roller 51 and the cam 38. v

Means are provided for oscillating each swing plate 23 to bring the blank and blow molds of the associated forming unit alternately to a single predetermined position with respect to the turret. For this purpose the pintle shaft 24 about the axis of which the swing plate 23 is adapted to oscillate is provided at its lower end, as seen in Figs. 2 and 3, with a bell crank 60 secured thereto. In order to make this action positive and positively to predetermine the terminal positions of the swing, one arm of the bell crank 60 is provided with an upstanding pin 6| passing through an arcuate slot 62 in the table or turret plate 8 and received in a suitable opening in the swing plate 23. Thus movement of the bell crank 60 will be positively imparted to the swing plate 23 and the limits of this movement will be predetermined by the dimensions of the slot 62. The second arm 53 of the bell crank 65 is provided, as illustrated in Fig. 5, with a cam roller 64 which is adapted to be received in a cam track 65 (Figs. 2, 3 and 5), formed in a member 66 mounted rigidly upon the base I of the machine. Thus rotation of the turret as above set forth will be effective through the varying diameter of the cam As setforth above, the machine disclosed in The manner of the accompanying drawings is a continuously rotating machine so that the problem arises of supplying charges of glass to the blank molds during the movement thereof. For this purpose it is desired that a deflector or charge guiding means have a cer tain movement approximating to some extent the movement of the molds to be charged during their passage through the charging zone.

As shown in the accompanying drawings, Figs. 1 and 2, the charges of glass are supplied from the feeder F which may be of any well known type. These charges pass down a chute system indicated generally at 61, which may be made in one or more sections and which may be supported in any desired manner in a stationary position. For directing the charges into the blank molds there is provided a deflector 68 which is mounted upon horizontal pintles 69, carried by a standard 10, the upper end of the deflector 68 being substantially over the center of the standard 10. This standard is mounted for oscillatory movement about a vertical axis substantially in alignment with the upper end of the deflector 68, so as the blank molds move past the lower end of the deflector, this lower end may be oscillated about a vertical axis eccentric of the turret to cause the path of thelower end of the deflector to approximate to some extent the path of the blank molds.

As shown, the standard is mounted upon the upper end of a vertical shaft 1 l, journaled in bearings I2 and 13 in a bracket 14, extending from the base I of the machine. Intermediate the bearings l2 and 13, the shaft H has connected thereto a collar carrying an arm 15, the outer end of which is adapted to be engaged successively by each of a series of rollers16 mounted upon the lower ends of the blow mold hinge pintles 41, or in any other suitable way upon the swing plates 23 or the lower turret plate 8. Thus as each forming unit passes through the charging zone the roller 16 thereof will engage the inner end of the arm to swing the deflector 58, causing its lower end to follow to some extent the path of the blank mold of the unit so that should there be a slight variation in the time of supply of the charges to the mold from the feeder F, these charges will be suitably guided into the mold centrally thereof. Suitable means, for example, a

. spring 11 extending between the arm 15 and a suitable fixed anchorage may be employed for returning the deflector to its initial terminal position after each roller 16 has passed beyond the end of the arm I5. Suitable stop means may be provided, which may take the form of an opening of predetermined size in the sleeve surrounding the shaft H intermediate the bearings 12 and 13 for limiting this return movement of the arm 15 under the action of the spring 11.

In some cases it may be desired for one reason or another to prevent the supplying of glass charges to one or more particular units while permitting the continued operation of the remaining units. For this purpose there are means operable in connection with the machine of my invention for deflecting glass charges to cullet for any unit which it is desired to hold out of operation without stopping the machine as a whole.

- As shown, Fig. 2, a cullet chute I8 is provided in such relation to the chute system 61 and the deflector 68 so that the latter may be rotated about the axis of its pintles 69 to deflect charges supplied down the chute system 61 into the chute 18 which may direct them to any suitable collecting point. For this purpose the deflector 88 is as above described, secured to the'pintles 69, one

of which has also secured thereto an arm 19 pivoted at 80 to the piston rod SI of a pneumatic cylinder 82. The pneumatic cylinder 82 is pivoted at 83 to a bracket '84 extending from the the piston 85 thereof and the left hand end of the cylinder, as seen in Fig. 2. This spring normally holds the deflector in its operable position in which it will be properly disposed to direct a charge of glass into one of the blank molds. When, how- ;ever, it is desired to deflect a. charge to cullet,

pneumatic pressure may be supplied to the cylinder 82 between the right hand end thereof, as seen in Fig. 2, and the piston 85. For this purpose there is provided a pressure line 86 having a flexible section 81 communicating with the cylinder 82 to accommodate the movements of the cylinder. The pressure line 88 communicates in a manner diagrammatically shown in Fig. 2 with a valve 88 secured to a cam carrying member 89 which in turn is secured to the main standard 3, as by means of a set screw 90.

Pivotally mounted upon the outer edge of the cam carrying member 89 is a rocker member 9| (Figs. 2 and 5), which carries a cam roller 92 and which has a portion in alignment with the stem 93 of the valve 88. The valve 88 communicates with a constant source of fluid pressure sup.- plied through a. pipe diagrammatically illustrated at 94 and may be assumed to be of the poppet type and which is normally maintained closed by a suitable spring (not shown). Thus when the cam roller 92 is engaged by a cam, later to be described, the rocker 9| will be swung to the right, as seen in' Fig. 5, to depress the valve stem 93 against the action of the spring within the valve to admit pressure through the pressure line 86 which will be efiective to swing the deflector 68 to a position to deflect a charge of glass down the cullet chute 18. Y

For operating the cam roller 92 to deflect charges when desired, each unit is provided with a cam 95 (Figs. 2 and 5), this cam being mounted upon a short shaft 96 pivoted in the upper turret plate I I for rotation about a vertical axis. Fig. 2

and the center portion of Fig. 5 show the inoperative position of this cam while the operative position thereof is illustrated at the right in Fig. 5 in which latter position it will be so located as to engage the cam roller 92 and open the valve 88 to deflect a charge of glass to cullet, as above set forth. v

For holding the cam in either of its two positions, the lower end of the shaft 96 is provided with a laterally extending arm 91 connected to the push bar 98 having at its outer end a handle 99 for manual manipulation. The bar 98 passe s loosely through a vertically elongated opening in a bracket I and is provided with a pair or spaced downwardly extending pins I 0| whichare adapted to engage on one side or the other of the bracket I00. A tension spring I02 is con nected between a suitable fixed anchorage on the upper turret plate II'and a stud on the push bar 98, this spring tending at all times to move the cam 95 toward its inoperative position at which it will not engage the cam roller 92. The cam may be locked in this position against movement by the pin IOI' seen at the right in Fig. 2.

engaging the left hand side of the bracket I 00, as seen in that figure. sired to move the cam 95 to a position such that it will engage the cam roller 92 and cause the deflection of a charge to cullet, asabove described,.the handle 99 is first elevated, the push bar 98 moved inward until the left hand stud IOI is at the right of the bracket I00, as seen in Fig.

v 2, and the handle and push bar-are then lowered so that this stud engages against the bracket portion at the bottom of the opening, thus holding the spring I02 tensed and positively locating the cam 95' in the position shown at the right in Fig.

From the above it will be apparent that any selected unit of the machine may be rendered in operative as far as forming glass is concerned and that the glass charges which normally would be supplied thereto may be deflected to cullet without the necessity of stopping the machine as a whole, or of cutting ofi the feeder, all

this during the time that any or all other units of the machine are in full operation.

Neck ring, mounting and operating means vertical movement used in effecting the transfer..

There is no relative lateral movement between the turret and the neck ring, the transfer being accomplished by raising the blank from the position it occupied in the blank' mold, then bringing the blow mold to this position andlowering the neck ring to lower the article to a position such that the blow mold may close therearound, this interchange of the positions of the blank and blow mold being accomplished by the movement of the swing plate 23, as above set forth.

Each neck ring is preferably formed of two complementary halves or. portions I03, as illustrated, in Figs. 1, 6- and 7. These portions or halves are mounted in suitable holders I04 which are pivotally mounted, as at I05, upon a vertical rod I06, one of the neck ring holders having two having one portion journaled thereon intermedi-' ate the two portions of the other holder, as illus- When, however, it is detrated in Fig. 7.. The rod I06 and another rod I01 parallel thereto are secured in the intermediate turret ring I4, as best seen in Fig. 2. Slidingly mounted on the rods I06 and I01 is a neck ring carrier I08, this carrier having portions sleeved on rod I06 above and below the pivotal portions for the neck ring holders I04, as illustrated at.l09 and H0 respectively. The neck ring holders I04 are respectively connected by links III with a cross head II 2 adapted for substantiallyradial movement with respect to the ma.- chine and guided in this movement by the provision of slide rods II3 rigidly secured thereto and adapted to slide in suitable bores in the neck ring carrier I08. A tension spring H4 is connected between the cross head H2 and a suitable anchorage II5 on the neck ring carrier I 08, this spring tending at all times to urge theneck ring portions I03 to their closed position.

For opening the neck rings-,the cross head H2 is" provided with a cam roller II6 adapted to cooperate with a cam I! 1, as illustrated in Figs. 1'

and 7, this cam being effective to move the cross head radially inwardly against the tension of the spring II4 to open the neck ring by force transmitted through the links III. Thus the neck rings, as well as the blank and blow molds, are resiliently urged to closed position and are provided with positive openingmeans subject to the rotation of the turret.

The neck rings are guided in their vertical movement by the sliding of their carrier I 88 upon the vertical rods I86 and I81. Means are provided for moving each neck ring carrier and its associated neck ring vertically when such action is desired. For this purpose the neck ring carrier I88 is connected by a pair of links II8 with the outer end of one arm of a bell crank I I8 which is pivoted at I20 to a bracket I2I secured to and depending from the upper turret plate II, as illustrated in Fig. 2. The other arm of the bell crank II9 depends below the pivot I28 thereof and carries a cam roller I22 which cooperates with a cam surilace I23 formed on the outer periphery of a member I24 secured to the center column 3 of the machine, as by the set screw I25. Thus the neck ring will be positively raised by the roller I22 engaging a large radius portion of the cam surface I23 and willbe lowered by gravity when the roller I22 comes opposite a smaller radius portion of this cam surface.

Pressing plunger, mounting and operating means therefor ably mounted upon the lower end of a piston rod- I21 so as to permit of the interchange of plungers when forming articles of different type or shape. The piston rod I21 extends through the lower end of a pneumatic cylinder I28 which is rigidly, but adjustably, mounted upon the upper turret plate II.

For mounting the cylinder I28 upon the upper turret plate II with provision for adjustment, there is provided a bracket I28 secured as by the bolts illustrated to the upper turret plate II, this bracket being secured by bolts I38 passing through vertically elongated slots therein to the pneumatic cylinder I28 so as to clamp'the cylinder to the bracket I28 in any desired vertically adjusted position. The cylinder I28 has formed thereon an extension I3I through which is threaded a jack screw I32, the lower end of which bears against a portion of the bracket I28. Thus when it is desired to adjust the cylinder I28 and the plunger I26 carried thereby vertically, all that is necessary is to loosen bolts I38, thread the jack screw I32 up or down, as may be necessary to secure the desired adjustment, and then tighten the bolts I30 to secure the cylinder in the new adjusted'position.

Within the cylinder I28 is a piston I33 of the usual type which is caused to move up or down to raise or lower the plunger I26 by the admission of fluid pressure between this piston and the opposite ends of the cylinder respectively. This fluid pressure'is admitted to the upper and lower ends of the cylinder through pressure lines I34 and I35 respectively which are diagrammatically shown in Fig. 2, although it will be understood that the course of these pressure lines is not exactly as shown in view of their cutting through a stationary part of the machine while the cylinder I 28 rotates with the turret. The pressure lines I34 and I35 lead to a two-way valve I36 suitably secured to 'the upper turret plate I I. Pressure is continuously supplied to the valve I36 through the line I3'I leading from an annular recess I38 in the bearing portion I2 of the upper turret plate II. Pressure is supplied to this annular recess through the lateral bore I38 and longitudinal bore I48 in the column 3 from a constant pressure supply line I which leads from any suitable source of supply of fluid pressure.

For operating the valve I36 as desired, there is provided a rocker member I42 pivoted. to a bracket I43 secured -to the upper turret plate- I I and carrying the cam roller I44 cooperating with the fixed cam I45, this construction being substantially similar to the mechanism shown in Fig. 5 at 8| and 92 for operating the valve 88 to control the deflector 68 in deflecting charges to cullet. The valve I36 is preferably of the piston type adapted alternately to admit pressure to the opposite ends of the cylinder I28 and to exhaust pressure from the end opposite to that at which pressure is being admitted. The piston of the valve is preferably pushed down by the rocket I42 and moved upwardly when such action is permitted by the configuration of the cam I45 by a suitable compression spring (not shown) Surrounding the pressing plunger I26 is a suitable follower generally indicated at I48 and constructed in the usual manner, the follower I46 being provided with a. plurality of vertically extending rods I41 rigid therewith, which pass upwardly through a fixed but adjustable. spring plate I48, the rods I41 having at their upper ends lock nuts I49 or other suitable stops to prevent excessive downward movement thereof and of the follower I41. Intermediate the spring plate I48 and the follower I46 and surrounding the rods "I41 are suitable compression springs I58, as in the usual practice. The spring plate 'I48 may be vertically adjusted on the plunger stem or piston rod I21 by threading upwardly or downwardly the nuts I 5| which confine it to a predetermined position on this piston rod. The operation of the follower and of the plunger is entirely conventional and hence further detailed description thereof is thought unnecessary. It may be said, however,

that the follower I46 may be, and preferably is,

formed in two parts and includes a plate I46a (Fig. 13) to which the rods I41 are secured and a removable glass contacting follower portion I46b interchangeable to provide for the formation of articles having different configurations of neck finish. Combined blow head and takeout tongs mechanism, mounting 'and operation thereof i I have provided in connection with my machine which they are formed to a suitable delivery station. Each of the blow heads as will hereinafter appear, cooperates successively with two adjacent blow molds and are also provided with means for moving them vertically toward and away from the blow molds, and also for movingthem vertically in placing the bottles at the delivery station.

Each blow head comprises a cup shaped member I52 (Figs. 1, 3, 5, 8 to 11 inclusive, and 16 to 18). As shown in the accompanying drawings, particularly Figs. 9 and 16 to 18, the cup shape members I52 are interchangeable and are each detachably secured to the lower end of a rod I53 which may be provided with a bolt head I54 for rotating it to secure the blow head against the lower end of a sleeve I55, which in turn may be integral with or secured to the outer end of an arm I56 extending laterally from the lower end of a vertical shaft I51. If desired, means may be provided for securing the blow head member I52 to the arm I56, in a manner such that a certain amount of free movement of the head I52 is provided to permit it to seat itself upon the neck ring or molds should these parts be somewhat uneven. Such means are, however, old in the art and hence form no part of the present invention, so that it was thought unnecessary to illustrate them in the accompanying drawings, the rigid connection shown being adequate to illustrate the present in- .vention. The shaft I51 is journaled as illustrated in Fig. 3 in upper and lower bearing members I55 and I59 secured to the upper turret plate I I and the intermediate turret ring II respectively.

Means are provided for rotating the shaft I 51 to movethe associated blow head I52 to a position to cooperate with the blow mold in the rear thereof and in another position to cooperate with the'blow mold in advance thereof, or vice versa, this means being: also utilized-in effecting the takeout of completed articles. For. this purpose,

the shaft I51 is provided intermediate its bearings with a gear. I66 secured thereto and meshing with a vertically elongated gear segment I 6! formed on the outer end of one arm of a bell crank I62 which is'pivoted at I63 to a suitable bracket extending fromthe intermediate turret ring II. The other arm of the bell crank I52 is provided with a cam roller III, as best illustrated in Figs.-

3 and '5, this cam roller cooperating with a suit- "ablyshaped cam track I65 formed in a bracket I66 extending from the stationary cam carrying member I26 which is secured as above explained to the center column '3 of the machine. Thus as the turret rotates, the blow head carrying shaft I 51 will be rotated to position the associated blow head I52 as desired to' cooperate with two adjacent molds and also will move it in the path substantially illustrated.in Fig. 5 by the dot and dash line for the takeout operation.

Means are also provided for moving the blow head vertically when desired. Forthis purpose the shaft I51 is'provided with a pair of spaced collars I 61 and I65 secured thereto adjacent to its upper end,'as by the pins shown inthe draw.-

ings Betweenthese collars and mounted on the shaft I51 is a sliding collar I69 which is separat ed from the lower collar I68 by a compression spring I16. The collar I69'is formed with an anis provided with a cam roller I16'adapted to-ride in a cam track I11 formed in the outer periphery of the cam carrying member 89, which is secured to'the upper end of the center column 3 of the machine as above set forth. Thus the blow head I52 will be resiliently lowered upon the cam roller I16 riding into a high portion of the cam track I11 through the compression of the spring I and will be positively raised by the engagement of the upper surface of the sliding collar I69 with the fixed collar I61 on the shaft I51, upon the cam roller I16 riding into a low portion of the cam track I 11. The gear segment I6! is vertically elongated so that it will mesh with the gear I66 in allthe vertical positions of the shaft 551. Y

Pressure is supplied to each of the blow heads from the annular recess I38 in the bearing portion I2 of the upper turret ring II through pipes I16 which lead to pressure controlling valves I19, one for each of the blow heads I52. These valves are operated by rocker mechanisms I66 carrying cam rollers I8I cooperating with an annular cam I62 secured to the under surface of the cam carrying member 89, the rocker members being similar in construction and operation to that illustrated in Fig. 5 at III and 92 for operating the valve 68 which controls the cullet deflector for each unit. The valve I19 may be considered to be of the poppet type and adapted to be depressed by the roller I6I riding under an extended portion of the cam I82 and returned by asuitthrough a longitudinal bore I91 with the interior of the cup I52, as will be seen from a consideration of Figs. 9 and 16 to 18. Thus pressure will be supplied to the interior of the blow head whenever the valve I19 is opened by the valve operating mechanism above described and in response to he rotation of the turreti Associated with each of the blow heads I52 is a takeout tongs mechanism. This mechanism comprises a pair of tongs fingers I 88 which are detachably secured to tongs carrying members I69 so as to permit of the interchange of fingers for accommodating articles of different shapes. The tongs carrying members I 59 are pivoted on spaced horizontal shafts I56 journaled in the lower end of thesleeve I55 of the arm I55. The shafts I 96 are-preferably rigidly secured to the members I89 and carry at their inner ends, as seen best in Fig. 10, interengaging members I'9I and I92 respectively, the member I9I by having a bifurcated end receiving the ball shaped end of the member I92. Thus motion imparted to one of the tongs carrying members will be similarly imparted to the other. For urging the tongs I88 constantly toward closed position, one of the shafts I90 is provided, as seen in Fig. 11, with an inwardly extending arm I93 to the inner end of which is connected the lower end of a tension spring I94 secured at its upper end to a fixed anchorage I95 shown as a pin extending from the sleeve'portion I55 of the arm I56. Thus the tension of the spring I94 will constantly tend to close the tongs I88.

For opening the tongs when desired there is provided a lever I96 carrying an adjustable stud I91 (Figs. 9 and 10), which is adapted to bear against the member I9I. The lever I96 is secured to a transverse shaft I98 pivoted in the lateral sides of the arm I56 and carrying at one side thereof a leverI99. Means are provided for moving the lever I99 to open the tongs and thereafter for locking this lever and the tongs controlled thereby in open position. As shown, the right hand upper portion of the upper end of lever I99, as seen in Fig. 9, is provided with an incline 200 and a flat face I, both of which cooperate with the left hand end as seen in this figure of the lever. 202 which is pivoted at 203 to the arm I56. The right hand end of the lever 202 is provided with a portion partly encircling the hub portion of the arm I56 and is adapted to cooperate with the bifurcated left hand end 204 of a lever 205, pivoted at 206 to a bracket carried I98 and causing the opening of the tongs.

by one of the vertical shafts I3 which tie together the variousplates of the turret. The right hand end of the lever 205, as seen in Fig. 3,

p is provided with a cam roller 20! adapted to ride in a cam track 208 formed in a member 209'secured to the member I66, which in turn is secured tothe cam carrying member I24 rigid with the center column 3 of the machine.

During the blowing of an article to final form it is desired that the tongs be locked in open position as shown in Figs. 9 and 11. For this purpose the cam track 208 is so formed as to, retain the parts in the position shown in Figs. 3, 9 and 11, in which the left hand end of the lever 202 is engaged" against the fiat face 20I of the lever I99. 'When'it is desired to allow the tongs to close, the cam roller 201 rides into a low portion of the cam track 208, which causes the engagement of the lower portion of the bifurcated end 204 of lever. 205 with a part of the right hand end of lever 202, thus moving this lever counterclockwise about its pivot 203so that its left hand end, as seen in Fig. 9, moves below the flat face 20I and downthe incline 200 of the lever I99,

thus permitting the clockwise rotation of the.

' pivot 206', as seen in Fig. 3, which causes the engagement of the upper portion of the bifurcated end 204 thereof with the right hand end of the lever 202. This causes the clockwise rotation of the lever 202 about its pivot 203' which causes its left hand end to ride up the incline 200 of the lever I99 causing the counterclockwise movement of this lever about the axis of the pivot As soon as the left hand end of the lever 202 has ridden onto the fiat face 20I of the lever I99 and has engaged behind the stop portion of this lever,

' the tongs will be locked in open position, which position of the parts will continue for the major portion of the rotation of the machine even after the roller 201 has ridden out of the cam track I have shown as a delivery station for the coinpl'eted articles, a portion of an endless conveyor 2I0 which is adapted to be continuously moved in the direction of the arrow shown in Fig. 1. This conveyor 2I0 may be of any conventional type and supported in any desired manner, as by a support generally indicated at ZII (Fig. 3).

It is desired that the placing of articles on the conveyor be accompanied by as little relative movement as possible between the movement of the tongs in which the articles are carried and that of the conveyor. In order therefore to cause the movement of the tongs to approximate that of the conveyor, both as to direction and speed,

sired direction, this movement being a resultant of the movement of the tongs due to the rotation of the turret and their movement'due to .the rotation thereof about the axis of the shaft Operation of the machine The operation' of the machine may best be 7 described considering Fig. 1 which is provided with legends setting forth one possible series of operations taking place around the cycle, the several operations being further illustrated in Figs. 12 to 18.

As a mold unit reaches substantially the horizontal position, as seen in Fig. 1, between the center and left hand side of the machine, which is the charging position, the forming unit is advanced with respect to the turret, that is the swing plate 23 of a unit to be charged is positioned as far, clockwise of its'pivot 24 as is possible. pair is at the common forming point for the unit and is in position to receive a mold charge-which is supplied thereto from the feeder F through the chute system 61 and deflector 69 as above set forth, it being assumed that the deflector is in position to direct a charge into the mold rather than to direct the charge to cullet. At this time the neck ring I 03 is closed and in a cooperativerelation with the blank mold so that the charge of glass is supplied therethrough. In Fig. 12 the parts are illustrated in the position in which they receive the charge, the charge it- ,self being indicated at 2I2.

Almost immediately after the blank mold has passed beyond the lower end of the deflector 68, the pressing plunger I26 is moved downwardly by the admission of fluid pressure to the cylinder I28 through the pressure line I34, pressure being exhausted through the line I35, this being accomplished by the suitable positioning of the plunger of valve I36. This operation is indicated in Fig. 1 by the legend Press. Hd. down. The press head may be retained in its lowered position for any desired -predetermined time, the parts in this position being illustrated in Fig. 13 and the glass now being pressed to form the blank as indicated at 2I3.

After the plunger hasbeen in its lowered position for a suflicient time for the extraction of the cam I45 opposite the cam roller I44.

the desired amount of heat from the blank to the plunger and mold walls so that the blank may be considered as set up, the plunger I26 is raised by the admission of pressure to the cylinder I28 through the line I35 and the exhaustion thereof through the line' -|34, this being accomplished by a shifting of the valve I36 in response to a diiference in the height of the portion of press head is thus raised out of contact with the glass. This operation is denoted onthe drawing, Fig. 1, by the legend Press Hd. up.

At any time after the press head-or plunger I26 has been stripped out of contact with the glass, the blank moldmay be opened, and considering now only the'mold in which the blank is being formed, the blank mold 21 'in which this blank 2l3 was formed isnow opened by the associated .cam roller 31 riding behind the portion 2 (Fig. 1) of the cam 38. This operation is indicated in Fi l by the legend Molds open and is illustrat in Fig. 14, the blank 2I3'now being supported on the bottom plate 43 and gripped by the neck ring I03. The next operation in the cycle is the transfer ring of the blank from the blank mold to the blow.-

mold. For this purpose the neck ring is lifted due to the roller I22 riding on to a high (larger radius) portion of the cam surface I23, which raises the blank 2I3 completely above the level of the blank and blowmolds of the forming unit being con-' sidered. The next operation in effecting the transfer is the swinging of the swing plate 23 of this unit from its advanced position to its retarded position with respect to the turret, which is accomplished, as above set forth, by the cam roller 64 riding into a small radius portion of the cam track 65. This positions the blow mold of the unit being considered beneath the neck ring. These two operations are indicated in Fig. 1 by the legends N. ring. lift and Molds swing respectively. The neck ring is then lowered carry-- ing the blank 2I3 therein to the position of the parts shown in Fig. 15, this operation being accomplished by the roller I 22 riding onto a small radius portion of the cam surface I23 and being denoted on Fig. 1 of the drawings by the legend N. ring down. The molds are then closed so that the blow mold now surrounds and supports the blank held in the neck ring, this operation being accomplished by the blow mold operating cam roller 5? riding up the portion 2 I5 of the cam 38 and being denoted on Fig. 1 of the drawings by the legend Molds close.

The blow head I52 has by this time been swung around to the position to cooperate with the blow mold in advance of its pivotalshaft I5? and is lowered by the configuration of the cam track iII so that it engages over the top of the neck ring as shown in Fig. 16, the tongs I83 being meanwhile lockedin open positionas indicated in Figs. 16 and 9. Blowing pressure is then admitted through the blow head and the neck ring to expand the glass to theshape of the blow mold as indicated in Fig. 16 and on Fig. 1 of the drawings by the legend Blow thru neck ring.

The provision as herein made of applying final blowing pressure to the interior of an article in the final blow mold, first through the neck ring The lapping cycle may be practiced in the use of the machine, as of course it would be impossible simultaneously to blow one article to final form through a single neck ring and at the. same time use this same neck ring in cooperative relation with the associated blank mold for theforming of a charge of glass into a parison. On the other hand, there are many types of articles, such for example as those having screw threaded tops or finishes'which have no other projection in-the finish to be made except the screw threads, which wouldbe extremely difiicult, if not impossible, to make unless provision were made for blowing in the final blow mold through the neck ring for asuflicient time at least to expand the glass to the shape of the final blow mold and thus anchor it securely therein. Thedropping of the parison. into the final blow mold would require some support of the finish of the parison by that mold, and if in the case of articles of this type this support were not supplied to an adequate extent by the finish provided, or if the only finish available for this.

support were the-inclined screw thread projec- I v tions, the support of the parison by the final blow mold prior to the expansion thereof in this mold would be insecure and inaccurate and tend to cause deformation of the parison prior to its expansion and consequent definite location within the final blow mold. Such a finish can be properly formed in the neck ring during the parison formation and if this finish is held securely in the same or some similar neck ring until the body portion of the glass is expanded to the shape of thefinal blow mold, the neck ring may then be safely removed without the possibility of swaying and consequent deformation of the article within this mold. .Thus properly formed articles are assured by the construction and manner of operation herein disclosed.

The next operation in the cycle is the'raising of the blow head which has effected the blowing thus far (after the admission of pressure thereto has been cut oh) and the starting of the swing thereof from the mold unit in advance thereof toward the mold unit in the rear thereof considering the cycle from the point of view of the direction of rotation of the turret as indicated .by the arrow (Fig. 1). As soon as this operation has progressed sufficiently so that the blow head is clear of the neck ring, this member is opened by the action of the cam Hit and then raised sufficiently to clear the top of the article in the mold. The swing plate 23 carrying the molds of the unit in question is then swung forwardly of the direction of rotation of the turret to its advanced position with respect thereto at which charging takes place, this action being accomplished by the action of the cam track 55 and the cam roller 84 associated therewith, the operation being indicated on Fig. 1 by the legend Molds swing. The neck ring is thus again in alignment with the blank mold and at any time between this point and-the charging point or zone the neck ring is lowered into engagement with the blank .mold of the unit for'the reception of the next charge of glass as above set forth.

Meanwhile the several adjacent blow heads I 52 continue their movement about the axis of their shafts i5'l, so that the blow head in advance of the unit in question is nowpositioned above the blow mold in which the article being. considered is being formed. This blow head is now lowered throughthe action of its cam roller I76 and the 7 cam track I TI to cooperate with the blow mold in which the article is being formed. It will be noted, however, that the blow head now being employed is not the same as that previously used in blowing the article, but this blow head is now lowered to engage the top of the blow mold as shown in Fig. 17 and surrounding the neck portion of the article. Further blowing pressure is now admitted through this blow head for a period of time extending beyond the time that the blank mold being considered has passed through the charging zone, has received a second charge of glass, and this second charge of glass has been pressed to form a second blank as above set forth. Thus the machine includes an overlapping cycle as set forth in the introduction to this specification. This operation isdenoted on the drawing, Fig. 1 by the legend Blow without neck ring.

The next and final operation on the bottle being considered is the takeout thereof. This is accomplished first by the opening of the molds as aforesaid, the blow mold being open substantially simultaneously with the blank mold. The locking mechanism for the tongs is then tripped so as to permit the tongs to close to engage the neck or finish portion of the article. The blow head and tongs carried thereby are then swung about the axis of their shaft I51 from a position in rear of this shaft to a position in advance thereof substantially through the path indicated by the dot and dash lines in Fig. 5, so that this blow head may again cooperate with the blow mold in advance thereof. However, intermediate this swing is the delivery of .the completed article onto the conveyor 2 l0. The article is gripped by the tongs of the blow head by which it is last blown, due to the closing of the tongs under the action of the spring I94. The blow mold being open the article is swung out over the conveyor ZIO, as illustrated in Figs. 1 and 18. The tongs are then lowered due tothe configuration of the cam track ill to lower the completed article onto the conveyor 2"! and the cam track I65 is so formed that the speed and direction of movement of the tongs approximates that of the conveyor 2), so that there will be little or no danger of tipping the article over when it is placed thereon. At the proper time the tongs are opened, through the means above described, including the cam track 298 and cam roller 20! (Fig. 3) The tongs and blow head are then raised so as to clear the article deposited on the conveyor as illustrated in Fig. 3 and the rotation of the shaft I51 carrying this blow head is then continued to position the blow head for the blowing of the next succeeding article through the neck ring.

It is to be understood that all of the mechanisms disclosed in the accompanying drawings are for purposes of illustration only as is also the particular cycle shown and described herein. Further, it is contemplated that any or all of the cams may be made adjustable as around the cent r axis of the turret for varying the cycle to a certain extent or may be made interchangeable if desired for this same purpose, particularly for making articles of somewhat different types. Also, while I have described a continuously rotating machine, it will be understood that the instrumentalities herein disclosed are to a major extent applicable also to an intermittent machine, for example, one in which certain relatively short stop times are provided at intervals in the rotation thereof and in which it is desired to effect certain of the operations during the rotation of the machine. Other variations may be made of the machine of my invention and of the methods of use thereof within the scope of the appended claims, which are to be construed as broadly as the state of the prior art permits.

I claim:

1. Apparatus for forming hollow glass articles comprising a rotatable turret, at least two blow molds carried thereby and positioned in spaced relation about said turret in which different glass articles are formed during overlapping periods of time, a single blow head carried by and rotating with said turret and constructed and arranged successively. to cooperate with two adjacent blow molds thereon, and means for admitting blowing pressure through said blow head to be successively applied to the interior of glass articles within each of said adjacent blow molds. I

2. Apparatus for forming hollow glassware, comprising a rotatable turret, a plurality of blow molds disposed about said turret, a plurality of blow heads the same in number as the blow molds and disposed about and carried by said turret for cooperation with said blow molds, operating means for said blow heads to cause each blow head to cooperate successively with two adjacent blow molds, whereby each blow mold is successively in cooperative relation with two adjacent blow heads, and means for supplying blowing pressure through each of said blow heads, the several means being so constructed and arranged that each article being formed in each of said blow molds is subjected successively to two applications of blowing pressure through two difierent blow heads respectively.

3. Apparatus for forming hollow glassware, comprising a continuously rotating turret, a plurality of forming units mounted on said turret for limited movement with respect thereto in advancing and retarding with relation to said turret, each of said forming units including a blow mold and a blank mold, a plurality of neck rings carried by said turret and adapted each to cooperate with one of said forming units and to effect a transfer of blanks formed in the blank heads similar in number to the number of forming units, each of said blow heads cooperating alternately with the blow mold of one of said units to supply blowing pressure through the neck ring associated with that unit to expand the glass in such blow mold and with the blow mold of an other of said units to blow the glass therein without the interposition of the associated neck ring by directly engaging the blow mold of such other unit, and means for controlling the supplying of blowing pressure to and through each of said blow heads. a

4. Apparatus for forming hollow glass articles, comprising a rotatable turret, means for rotating said turret about a vertical axis, at least two blow molds mounted on said turret, a combined blow head and takeout tongs mechanism mounted on said turret for cooperation alternately with two adjacent blow molds, an arm carrying said combined blow head and takeout tongs mechanism mounted to swing on a vertical axis moving with but eccentric of the axis of rotation of said turret, means to operate said blow head to cause it to cooperate with and admit blowing pressure to glass in each of said blow molds alternately, and means for causing said head and takeout tongs to swing in a substantially horizontal arcuate pathabout the axisof said arm and with respect to said turret for moving the head from a position in cooperation with one of said blow molds to a position in cooperationwith the other of said blow molds and during this movement for operating the takeout tongs mechanism associated with said head for removing a completed article from the first named blow mold and transferring it to a delivery station outwardly of said turret.

5. Apparatus for forming hollow glass articles, comprising a rotatable turret, means for rotating said turret about a vertical axis, at least two blow molds disposed about said turret, an arm mounted for swinging movement about a vertical axis rotating with said turret but eccentric of the axis of rotation thereof, a combined blow head and takeout tongs mechanism mounted on said arm, means for moving said arm about its vertical axis and with respect to said turret to bring said blow head alternately into cooperative relation with two adjacent blow molds at the ends of its swinging movement, means for moving said arm and the blow head and tongs mechanism carried thereby vertically, means for supplying blowing pressure through said head to the interiors of glass articles in each of said adjacent blow molds, means for actuating said tongs mechanism to grasp a completed glass article in one of said blow molds for the removal thereof upon the opening of this blow mold, and means for causing said tongs mechanism to open togrlease a glass article gripped thereby at av delivery station intermediate the ends of the swing ofsaid arm between a position to locate said blow head in cooperative relation with the blow mold in which the article was formed and the other of said adjacent blow molds.

6. Apparatus for forming hollow glass articles, comprising a rotatable turret, means for rotating said turret continuously about a vertical axis, at least two blow' molds mounted for rotation with said turret, a combined blow head and takeout tongs mechanism adapted to cooperate alternately with two adjacent blow molds and to ,supply blowing pressure to the glass in each of said adjacent blow molds, means for causing said blow head to cooperate with each of said adjacent blow molds alternately including means for swinging said blow head about a substantially verticalaxis "rotating with theturret but eccentric ,of the axis of rotation thereof, means for admitting blowing pressure through said blow headinto the glass in each of said adjacent blow molds for predetermined periods of time, means for causing the takeout tongs mechanism carried by said blow head to grip a completed article in' one of said blow molds and thereafter and intermediate the swing of said head between said adjacent blow molds to release the completed article at a'delivery station, and cam means operating in response to the continuous rotation of said turret for determining the direction and angular velocity of the swinging movement of said tongs mechanism intermediate the ends of the swing of said blow head so that the resultant direction and velocity of movement of the takeout tongs carrying the completed article may be predetermined as desired.

7. Apparatus for forming hollow glass articles, comprising a continuously rotated turret, means for rotating said turret continuously about a vertical axis, a plurality of glass forming units mounted on said turret, each unit including a blank mold, a blow mold and a single neck ring, the neck ring of each unit being mounted on said turret for solely vertical and opening and closing movement in respect thereto, a swing plate mounted on said turret forlimited swinging movement with respect thereto about a vertical axis eccentric of the axis of rotation of said turret and carrying the blank and blow molds of each unit, means for opening and closing said neck ring, means for opening and closing each of said blank and blow molds, means for raising and lowering 'said neck ring, the aforesaid parts being so conring, lowering the neck ring to position the blank within the open halves of the blow mold and closing the blow mold about the blank as so positioned, means including a pressing plunger for each unit mounted on said turret for forming blanks in the blank mold and'neck ring of the associated unit, the mold and neck ring operating means being thereafter actuated to effect the transfer of the blank from the blank mold to the blow mold of each unit as aforesaid, a plurality of combined blow heads and takeout tongs mechanism' equal in number'to the number of forming units and each arranged to cooperate with blow molds of two adjacent units, the parts being so constructed and arranged that each blow head cooperates with a unit in advancethereof while such unit is in a retarded position with respect to said turret to expand a blank in the blow mold of. such unit by pressure admitted through the neck ring of such unit and thereafter to cooperate with the blow mold in the rear thereof to admit further blowing pressure to the interior of the article within the blow mold of the rearward unit while it is advanced with respect to said turret, whereby the neck ring may reassume its position in cooperation with the blank mold of its associated unit during the second blowing of an article therein for the forming of a second blank while blowing pressure is still being applied to the blow mold of that unit, and means for actuating the combined blow heads and takeouts to the end that 

